I have a stripped AR15 Stag lower that I am putting out for a feeler for a SS premium centerfire barrel blank. I'm looking for something in ether, .22, 6mm, .257, 6.5mm, 7mm, or .358. The 6mm I would want for F-class so it should be appropriate contour, preferably 1.25" straight blank. The rest can be #4, or #5 or even a #6 contour and fluted would be cool. I like shooting heavy bullets too! I'm open to any offers. Reveiver will go through ffl from private.